Drying apparatus.



2 SHEETS-SHEET l.

Patented Apr. 11,1916.

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F.*KLEINSCHIVIIDT. DRYING APPARATUS. APPLICATION FILEDMAR. 28. 1912.

Y 1,179,192. Patented Apr. 11, 1916.

2 SHEETS-SHEET 2.

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FRANK KLEINsoHMID'r, or BUFFALO,` NEW Yonx D RYING APPARATUS.

Specicatitters Patent. Patented plgl, 1916.

Application led March 28, 1912. Serial No. 686,723.

'has for its primary object the provision of a comparatively simple and inexpensive apparatus which will permit of drying material in batches or' continuously, as desired.

Other objects are lto so construct the apparatus that the heat applied thereto will bedistributed so as to 'come in' contact with every portion of the surface of the contaming drum or receptacle, and to distribute the heat approximately evenly to said surface.

A further.l object of my invention is to provide means to apply the heat directly to the material to be dried or indirectly through the wall of the containing drum or receptacle, as desired; to, provide means for the escape of vapor and fumes from the material being dried; to direct the fumes to the fire so as to be consumed thereby; to condense the vapor passing from the material being dried; and to automatically discharge the water of condensation into a sewer or otherwise.

-Further objects of my invention are to provide an apparatus of this kind by means' of which an increased capacity is obtained over other drying apparatuses now 1n use; and to otherwise improve -on the construction and arrangement of parts.

With these ends in view, the invention consists ini the novel features of construction and in the arrangement and combination of devices and parts to be hereinafter described and particularly pointed out in the subjoined claims. f

In the drawings, Figure 1 is a central longitudinal section through an apparatus constructed according to my invention. Fig. 2 is a rear end view of the same. Fig. 3 is a transverse section taken on line 3-3,

' Fig. 1.

Referring now to the drawings in detail,

like numerals of reference refer to likek drum an openlng 31 is provided and se- The reference numeral 4 designates the parts in the several figures;

driven in any suitable manner.`

material-containing drum or receptacle which 1s located within .a furnace 5 constructed in the main of brick, the ends of said drum or receptacle extending from opposite ends of said furnace. a The furnace has the usual side walls 6, a top'wall 7, a front wall 8, and a rear wall 9. Between said front and rear walls is located a bridge wall 10 and between said bridge wall and said front wall is arranged the re-place 11 having underneath'it the usual ash pit 12 separated from said fire-place by the grate 13. Extending rearwardly from said front wall and above said grate is a distributer arch or diffuser 14, which is preferably constructed of fire brick and has a series of openings 154 extending therethrough. The rear end of said Adistributer arch or diffuser is separated from the bridge wall by a narrow passage 16. `The front wall 8 has openings 17 formed therein for access to the fire place, which openings are closed by door 18 and an opening 19 is vand passing through heads 25 ixedly supported and closing the open ends .of said drum. At opposite ends of the furnace are arranged frames 26 having secured thereto bearing boxes'27 which may form part of the heads 25 and-in which said shafts 24 are journaled. The shaft 24 at the front of the furnace has a driving pulley 28 secured (thereto around which passes a belt 29 Arranged Within the drum 4 lis acon veyer 30 so arranged therein that it conveys the material from one end of the drum to the other, preferably from the: forward end to the rear end thereof, said conveyer being preferably constructed of a spirally formed bar secured to the'inner face of the' drum,l as clearly shown in Fig. 1.

In the head 25 at the rear en'd of the cured to said head is a iue 32 having comv munication withthe interior of said drum through said opening. The drum is so arranged within the furnace that 1t vhas a heat space 33 entirely-surrounding it and opening into said heat space is a smoke stack 34, said stack being fitted into the top wall 7 of the furnace and having the Hue 32 connected therewith. ln' said smoke stack is arranged a damper 35 and a similar damper 36 is arranged in the Hue 32.

An opening 37 is formed in the head at the front endof the drum and secured to said head is a feed-tube 38 adapted to feed material into said drum through said opening. Said feed-tube may be ledto any desired point and as illustrated in thedrawing is preferably directed into the story above the furnace-room. In leading said tube into the story above, it passes through the Hoor, 39 and formed in said tube directly above the Hoor is a feed opening 40 which may be closed by gate or door 41,

. that it gravitates into the drum.

as shown. Upon opening said door the material to be dried may be shoveled from the Hoor 39 directly into the'gfeed-tube so ln this manner the drum may be supplied with the p material to be dried in batches so that after the desired quantity is delivered into the drum the gate or door 41 may be closed.

l have made provision for a continuous f eed of the material to be dried by connecting the feed-tube above the opening 40v with a vertically disposed tube 42 having connection at its upper end with a horizontally-disposed tube 43 provided with a conveyer 44 of ordinary construction, said conveyer being driven by means of a belt 45 cured thereto thesuction inducer 49 which is preferably cylindrical in shape "and provided with a conical portion 50 and it has a steam 'supply pipe 51 arranged therein which terminates in a pointed nozzle 52 occupying a position centrally in the restricted or small end of said conical portion.

Secured to the restricted or vsmall end of said conical portion is a Haring tube section 53 which has connection with a verticallydisposed Hue 54 directed downwardly for'` connection with the top wall of a tank 55,

said tank having depending from its top wall abaiiie-plate 56, at one side of which said tube 54.is arranged to enter the tank 'arranca and on the other side of said baHle-plate is a pipe or Hue 57 which is directed to a point underneath the lire grate 13 of the furnace, as at 58. The tank 55 is supplied with water, the level of which is governed-by a trap 59 connected to the tank at or near its lower end, as at 60. Secured to said trap at its upper end is a vent-pipe 61 which serves to prevent siphoning of the tank 55.

Arranged in the upper end ofthe vertically-disposed. Hue 54' is a condenser 62 which comprises a cold water pipe 63- and a perforated sprinkler head 64.

The head at the rear end of the drum 4 `is provided with a discharge opening 65 closed by a door 66 which is held in closed rposition by an arm 67 adapted to engage a keeper 68 secured to the rear-wall 9.or the annulus 22 applied to said rear end.

The operation of the apparatus is4 as follows: rlhe heat of the vfire within the Hreplace is directed upwardly through the narrow space 1 6 .between the bridge wall and the distributer arch or diffuser and also through 'thefopenings 15 in said diH'user, said arch or diffuser serving particularly to prevent the front end of the drum being subjected to a greater degree of heat than the rear and consequently diffuses the heat so that the proper proportion y'will pass rearwardly and upwardly along the drum; the heat therefore is directed to all parts of the heat space 33 and serves to heat and dry the materialwithin the drum. The damper 35 in .within the drum being arranged to render.

the smoke-stack checks the escape of heat and when the damper 36 in the Hue 32 is closed the heat is prevented from passing through said Hue. During the heating of the drum, the latter is rotated so as to present new portions of the material to the wall of the drum and also to direct the material rearwardly toward the rear head 25.

The pitch of the spirally arranged bars the rearward passage of the material slow and by the time the' material reaches the rear end of the drum it will be thoroughly dry, when it may be discharged through the openings 65 by opening the'door 66 thereof. The fumes and moisture from the material escapes through the feed-tube 28 and owing to the suction inducer 49 being arranged at the end of saidl tube the escape of the moisture and fumes'is accelerated. The steam escapin from the nozzle 52 passes with the moistureand fumes down the tube 54 vand is 'condensed by the spray of cold water coming in contact therewith from the sprinkler head 64, the moisture and water settling in the tank 55 in which the water is maintained at a constant level by the trap 59 and as thelevel of the water ytank it overHows'v the trap and passes away to a sewer or'may otherwise bedis'p'osed of,

the vent-pipe 61 at the upper end of the trap 59 serving to prevent siphoning of the water from the tank. The fumes entering the tank 55 pass around the baille-plate `56 and escape through the pipe 57 which leads it into the fire to be there consumed. If desired, the heat of the furnace may be directed through the drum so as to come in direct contact with the material being dried, this being accomplished by opening the damper 36 in the flue 32 and closing the damper 35 in the smoke-stack. When the dampers are thus arranged the heat escapes with the fumes and moisture through the feed tube.

It willbe apparent from the foregoing that changes in minor details of construction and departures from the exact arrangement of the parts may be resorted to without departing from the spirit of my invention or sacrificing any of the advantages thereof and, furthermore, parts of the apparatus may be used without others as the functions of each will be performed fully as well as when all are combined.

Having thus described my invention, what l claim is,-

1. In a drying apparatus, the combination with a furnace having a fire-place, a perforated wall above said re-place and a bridge wall at the rear end of said fire-place separated from the rear end of said perforated wall by an intervening space, of a drum rotatable in said furnace in a plane above said perforated wall and having a feed opening and a discharge opening.

2. In a drying apparatus, the combination with a furnace having a fire-place, a perforated wall above a portion of said fireplace and a bridge wall forming the rear end wall of said fire-place, the rear end of said perforated wall being spaced from said bridge wall, of a drum rotatable in said furnace above said perforated wall and above the space between said perforated wall and said bridge wall, said drumI extending in rear of said bridge wall and having a feed opening and a discharge opening.

3. In a drying apparatus, the combination with a furnace having a fire-place, a perforated wall above said fire-place and a bridge wall at the rear end of said {ire-place separated from the rear end of saidperforated wall by an intervening space, of a drum rotatable in said furnace in aA plane above said perforated wall and having a feed opening and a discharge opening, all products of combustion escaping from the rear end ofl said fire-place passing upward through said intervening space.

4. In a drying apparatus, the combination with a furnace, of a drum rotatable in said furnace, a feed tube connected to said drum, a suction inducer connected with said feed tube, a condenser connected with said suction inducer, and a tank connected with said condenser, said tank having a water escape and an escape for fumes and said latter escape being directed into the furnace beneath its lire-place.

5. In a drying apparatus, the combination with a furnace having a smoke-stack provided with a damper, of a drum rotatable in said furnace and having a fixed head at one end provided with a feed-tube, said drum having also a fixed head at its other end provided with a discharge opening, means within said drum for conveying the material from the' first-mentioned end to its other end, and a flue connecting said second-mentioned head with the smoke-stack and having a damper therein, said iue receiving the heat from said smoke-stack and directing it into said drum.

In testimony whereof, I have affixed my signature in the presence of two subscribing witnesses.`

FRANK KLEINSCHMIDT.

Witnesses EMIL NEUHART, ELIZABETH HEINTZ. 

